Question

Which of the following cannot be charged by touching with a charged copper rod?

• A. Glass
• B. Silver
• C. Ebonite
• D. Mercury

Answer 1

Answer: (A), (C), (D)

The correct options are
A Glass
C Ebonite
D Mercury

Charging by conduction is a process in which the object to be charged is touched by a charged metal rod which allows the electric charge to flow into the object. Only conductors can be charged by this process as they allow electrons to easily flow into them. All metals are good conductors of electricity. Hence insulators which are bad conductors of electricity cannot be charged by conduction. Among the given options, glass, ebonite and mercury are insulators.